Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
  • C08G18/72—Polyisocyanates or polyisothiocyanates
  • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
  • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
  • C08G18/72—Polyisocyanates or polyisothiocyanates
  • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
  • C08G18/78—Nitrogen
  • C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
  • C08G18/797—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing carbodiimide and/or uretone-imine groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/08—Processes
  • C08G18/09—Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture
  • C08G18/095—Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture oligomerisation to carbodiimide or uretone-imine groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
  • C08G18/3203—Polyhydroxy compounds
  • C08G18/3206—Polyhydroxy compounds aliphatic
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
  • C08G18/343—Polycarboxylic acids having at least three carboxylic acid groups
  • C08G18/346—Polycarboxylic acids having at least three carboxylic acid groups having four carboxylic acid groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
  • C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
  • C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/48—Polyethers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J3/00—Processes of treating or compounding macromolecular substances
  • C08J3/18—Plasticising macromolecular compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
  • C08K5/0016—Plasticisers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/10—Esters; Ether-esters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/10—Esters; Ether-esters
  • C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/13—Phenols; Phenolates
  • C08K5/134—Phenols containing ester groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/17—Amines; Quaternary ammonium compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/29—Compounds containing one or more carbon-to-nitrogen double bonds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/49—Phosphorus-containing compounds
  • C08K5/51—Phosphorus bound to oxygen
  • C08K5/52—Phosphorus bound to oxygen only
  • C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/54—Silicon-containing compounds
  • C08K5/541—Silicon-containing compounds containing oxygen
  • C08K5/5435—Silicon-containing compounds containing oxygen containing oxygen in a ring
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
  • C08L75/04—Polyurethanes
  • C08L75/06—Polyurethanes from polyesters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
  • C08J2375/04—Polyurethanes
  • C08J2375/06—Polyurethanes from polyesters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/49—Phosphorus-containing compounds
  • C08K5/51—Phosphorus bound to oxygen
  • C08K5/52—Phosphorus bound to oxygen only
  • C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
  • C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds

Definitions

• the present invention relates to a process for producing a thermoplastic polyurethane, comprising the provision of a composition Z(W) comprising at least one carbodiimide selected from the group consisting of monomeric aliphatic carbodiimides, oligomeric aliphatic carbodiimides, polymeric aliphatic carbodiimides, monomeric aromatic carbodiimides, oligomeric aromatic carbodiimides and polymeric aromatic carbodiimides, and at least one ester selected from the group consisting of citric acid esters, acetyl citric acid esters, phthalic acid esters, benzoic acid esters, adipic acid esters, hydrogenated phthalic acid esters and phosphoric acid esters; and the subsequent addition of the composition Z(W) to a thermoplastic polyurethane or to a reaction mixture for producing a thermoplastic polyurethane.
• a composition Z(W) comprising at least one carbodiimide selected from the group consisting of monomeric aliphatic car
• the present invention relates to a thermoplastic polyurethane obtainable or obtained by a process according to the invention and to the use of the composition Z(W) as plasticizer for thermoplastic polyurethanes.
• the present invention also relates to moldings comprising a thermoplastic polyurethane according to the invention.
• Plasticized thermoplastic polyurethanes are widely known and are described, for example, in DE 10 2005 040 131 or EP 1 338 614.
• Thermoplastic polyurethanes of this kind comprise at least one plasticizer.
• the plasticizer it is to be ensured particularly that the product is compatible with the thermoplastic polyurethane, the plasticizer has a sufficiently good plasticizing effect and that the plasticizer does not bring with it a negative influence on, for example, resistance to water and other media.
• thermoplastic polyurethanes are often phthalates and benzoates for polyester-TPU or phosphates for polyether-TPU. Systems of this kind are disclosed, for example, in EP 1 556 433 or EP 0 134 455. Furthermore, known plasticizers are selected from the group of adipates, hydrogenated phthalates, fatty acids or citric acid esters, with the latter being disclosed, for example, in EP 1 108 735 or WO 2010/125009.
• thermoplastic polyurethanes It is known from the prior art that pure citric acid esters have a very good plasticizing effect in thermoplastic polyurethanes.
• WO 2010/125009 discloses a corresponding plasticizer for thermoplastic polyurethanes.
• pure citric acid ester has the disadvantage of a low thermal resistance, for example even at temperatures as arise during the production and the processing of these esters as well as the incorporation of these esters into thermoplastic polyurethane.
• acetylbutyl citrate can sometimes thermally decompose in such a way that a considerable increase in the acid number is measurable.
• thermoplastic polyurethane If a plasticizer damaged in this way is incorporated into thermoplastic polyurethane, this has a negative effect on the resistance of the plasticized thermoplastic polyurethane. This can lead to, for example, the hydrolysis resistance of a thermoplastic polyurethane plasticized in this way being considerably impaired.
• thermoplastic polyurethanes which have adequate resistance to thermal degradation. It was a further object of the present invention to provide plasticizers for thermoplastic polyurethanes which have an adequate hydrolysis stability.
• thermoplastic polyurethanes using plasticizers of this kind.
• thermoplastic polyurethane comprising the steps
• the present invention relates to a process for producing a thermoplastic polyurethane comprising the steps (i) and (ii).
• a composition Z(W) is provided which has at least one carbodiimide, and at least one ester as defined above.
• the composition Z(W) is added to a thermoplastic polyurethane or a reaction mixture for producing a thermoplastic polyurethane.
• the composition is added to a fully reacted thermoplastic polyurethane or to a reaction mixture for producing a thermoplastic polyurethane.
• composition Z(W) is added to a reaction mixture, this can in principle take place at any stage in the production process of a thermoplastic polyurethane.
• composition Z(W) is added to an essentially fully reacted thermoplastic polyurethane, this can take place for example by means of incorporation by compounding or incorporation by swelling.
• the present invention accordingly also relates to a process as described above where the composition Z(W) is added according to step (ii) to a thermoplastic polyurethane by means of incorporation by compounding or incorporation by swelling.
• composition Z(W) according to the invention, a stabilization of the ester selected from the group consisting of citric acid esters, acetyl citric acid esters, phthalic acid esters, benzoic acid esters, adipic acid esters, hydrogenated phthalic acid esters and phosphoric acid esters is achieved through the addition of a carbodiimide-containing stabilizer, and the resulting increase in the acid number of the ester can be considerably reduced for the same thermal stress.
• the acid number serves here as a measure of the thermal degradation of the ester.
• the increased acid number simultaneously has a negative effect on the hydrolytic stability of the resulting plasticized thermoplastic polyurethane.
• a further advantage of the systems according to the invention is also the considerably improved resistance to hydrolytic degradation.
• a plasticized thermoplastic polyurethane using the composition Z(W) according to the invention has, according to the examples, a hydrolysis stability of 56 days.
• a thermoplastic polyurethane comprising a non-stabilized variant by contrast, only has a hydrolysis stability of 35 days, according to the examples.
• the stabilization according to the invention it is thus possible firstly to increase the thermal stability of an ester-based plasticizer.
• the stabilization of the plasticizer it is also possible to produce a plasticized thermoplastic polyurethane with considerably improved hydrolysis stability.
• this effect is attributed to the order of addition according to the invention, i.e. a provision of the composition Z(W) and a subsequent addition to the thermoplastic polyurethane.
• thermoplastic polyurethane comprises the provision of a composition Z(W) comprising
• composition Z(W) here can be obtained in all ways known to the person skilled in the art, for example by mixing the component. According to the invention, the mixing can take place by means of standard processes.
• the composition Z(W) can be produced directly prior to addition to the thermoplastic polyurethane.
• the production of the composition Z(W) in the context of the present invention involves the mixing of the components and a setting of the acid number.
• the setting time here is up to 30 minutes.
• the composition Z(W) according to the invention is storage-stable and can also be further processed at a considerably later time with properties according to the invention.
• the present invention accordingly also relates to a process as described above where the production of the composition Z(W) involves the mixing of the components and a setting of the acid number.
• the present invention according to a further embodiment also relates to a process as described above where the addition of the composition Z(W) takes place according to step (ii) after the setting has concluded.
• composition Z(W) comprises at least one ester selected from the group consisting of citric acid esters, acetyl citric acid esters, phthalic acid esters, benzoic acid esters, adipic acid esters, hydrogenated phthalic acid esters and phosphoric acid esters.
• the composition Z(W) can also comprise mixtures of two or more of the specified esters.
• esters are those which have adequate compatibility with the thermoplastic polyurethane used and achieve a plasticizing effect. Furthermore, esters are suitable which can be processed under reaction conditions that are usually present during the synthesis and processing of thermoplastic polyurethanes, i.e. esters which have an adequate stability at a temperature in the range of up to 250° C.
• a compatibility suitable according to the invention is, for example, in the range from 15 to 50%, where the compatibility of the ester with the thermoplastic polyurethane in the context of the present invention is determined by reference to the transparency of the overall system.
• the overall system in the context of the present invention is transparent, i.e. a homogeneous mixture of the components is present.
• a reduction in the Shore hardness in the range from 3 Shore A to 35 Shore A, preferably in the range from 5 Shore A to 25 Shore A, for example in the range from 6 Shore A to 15 Shore A, is advantageously achieved by the plasticizing properties compared to a thermoplastic polyurethane without the addition of the composition Z(W).
• Suitable esters are known per se to the person skilled in the art as plasticizers for thermoplastic polyurethanes.
• the composition Z(W) comprises at least one ester selected from the group consisting of citric acid esters and acetyl citric acid esters.
• plasticizer compounds based on citric acid esters can carry either no functional groups such as, for example, CITROFOL® B II, or else OH functions such as, for example, CITROFOL® B I or CITROFOL® A I.
• Preferred esters are those of the general formula (I):
• the present invention accordingly also relates to a process as described above where the composition Z(W) comprises at least one citric acid ester.
• the composition Z(W) comprises at least one ester selected from the group consisting of triethyl citrate, tyltriethyl citrate, tri(n-butyl) citrate, acetyltri(n-butyl) citrate and acetyl(2-ethylhexyl) citrate.
• composition Z(W) further comprises at least one carbodiimide selected from the group consisting of monomeric aliphatic carbodiimides, oligomeric aliphatic carbodiimides, polymeric aliphatic carbodiimides, monomeric aromatic carbodiimides, oligomeric aromatic carbodiimides and polymeric aromatic carbodiimides.
• carbodiimide selected from the group consisting of monomeric aliphatic carbodiimides, oligomeric aliphatic carbodiimides, polymeric aliphatic carbodiimides, monomeric aromatic carbodiimides, oligomeric aromatic carbodiimides and polymeric aromatic carbodiimides.
• carbodiimides used according to the invention can also vary within wide ranges. Suitable carbodiimides are described, for example, in EP 0 628 541, DE 43 189 79 A1, DE 198 21 666 A1 or EP 1 138 706 B1. Particularly suitable carbodiimides are described, for example, by the general formula (II).
• the present invention accordingly also relates to a process as described above where the composition Z(W) comprises at least one carbodiimide selected from the group consisting of monomeric aliphatic carbodiimides, oligomeric aliphatic carbodiimides and polymeric aliphatic carbodiimides.
• the molar ratio of added carbodiimide groups to the initial acid content of the ester used can vary in wide ranges and, according to the invention, is preferably in the range from 20:1 to 1:10, preferably 10:1 to 1:2.
• the present invention accordingly also relates to a process as described above where the molar ratio of added carbodiimide groups to the initial acid content of the ester used is in the range from 20:1 to 1:10.
• the amount of composition Z(W) used is based on the total amount of thermoplastic polyurethane. According to the invention, this can vary within wide ranges, the composition Z(W) being used in accordance with the invention in amounts which is customary for plasticizers.
• the amount of composition Z(W) based on the total amount of thermoplastic polyurethane is in the range from 1 to 50% by mass, in particular in the range from 2.5 to 40% by mass, preferably in the range from 5 to 35% by mass, and particularly preferably in the range from 7.5 to 30% by mass. If the composition Z(W) is added to a reaction mixture for producing a thermoplastic polyurethane, the amount of composition Z(W) used in the context of the present invention refers to the total amount of structural components used in the thermoplastic polyurethane.
• the present invention accordingly also relates to a process as described above where the amount of composition Z(W) based on the total amount of thermoplastic polyurethane is in the range from 1 to 50% by mass.
• the composition Z(W) is added to a thermoplastic polyurethane or a reaction mixture for producing a thermoplastic polyurethane.
• thermoplastic polyurethanes used can likewise vary within wide ranges.
• Processes for producing thermoplastic polyurethanes are generally known.
• the polyurethanes are produced by reacting (a) isocyanates with (b) compounds reactive towards isocyanates and preferably with (c) chain extension agents, optionally in the presence of (d) catalysts and/or (e) customary auxiliaries.
• the aim below is to explain by way of example preferred starting components and processes for producing preferred polyurethanes.
• the components of (a) isocyanates, (b) compounds reactive towards isocyanates, (c) chain extension agents, and optionally (d) catalysts and/or (e) customary auxiliaries preferred by way of example in the production of these polyurethanes will be described below.
• the isocyanates (a), the compounds (b) reactive towards isocyanate and, if used, also the chain extenders (c) are also discussed as structural components.
• Organic isocyanates (a) that can be used are generally known isocyanates, preference being given to aromatic, aliphatic, cycloaliphatic and/or araliphatic isocyanates, further preferably diisocyanates, preferably 2,2′-, 2,4′- and/or 4,4′-diphenylmethane diisocyanate (MDI), 1,5-naphthylene diisocyanate (NDI), 2,4- and/or 2,6-tolylene diisocyanate (TDI), 3,3′-dimethyldiphenyl diisocyanate, 1,2-diphenylethane diisocyanate and/or phenylene diisocyanate, tri-, tetra-, penta-, hexa-, hepta- and/or octamethylene diisocyanate, 2-methylpentamethylene diisocyanate-1,5,2-ethylbutylene diisocyanate-1,4-pentamethylene diisocyan
• MDI 2,2′-, 2,4′- and/or 4,4′-diphenylmethane diisocyanate
• NDI 1,5-naphthylene diisocyanate
• TDI 2,4- and/or 2,6-tolylene diisocyanate
• HDI hexamethylene diisocyanate
• H12MDI 4,4′-, 2,4′- and 2,2′-dicyclohexylmethane diisocyanate
• H12MDI 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane IPDI, especially preferably 4,4′-MDI.
• Chain extension agents (c) that can be used are generally known aliphatic, araliphatic, aromatic and/or cycloaliphatic compounds. Suitable compounds are known to the person skilled in the art. Suitable compounds preferably have groups reactive towards isocyanates, such as e.g. alcohol or amine groups, preferably alcohol groups.
• Suitable catalysts (d), which in particular accelerate the reaction between the NCO groups of the isocyanates (a), preferably of the diisocyanates and the hydroxyl groups of the structural components (b) and (c) are the tertiary amines customary and known according to the prior art, preferably triethylamine, dimethylcyclohexylamine, N-methylmorpholine, N1N′-dimethylpiperazine, 2-(dimethylaminoethoxy)ethanol, diazabicyclo-(2,2,2)-octane and similar as well as in particular organic metal compounds such as titanic acid esters, iron compounds, preferably iron-(MI) acetylacetonate, tin compounds, preferably tin diacetate, tin dioctoate, tin dilaurate and/or tin dialkyl salts, of aliphatic carboxylic acids, preferably dibutyltin diacetate, dibutyltin dilaurate
• auxiliaries are also added to the structural components (a) to (c). Mention may be made, for example, of surface-active substances, flame retardants, germinating agents, oxidation stabilizers, lubricating and mold release aids, dyes and pigments, stabilizers, e.g. against hydrolysis, light, heat or discoloration, inorganic and/or organic fillers and reinforcing agents.
• the structural components (b) and (c) can be varied within relatively wide molar ratios.
• the thermoplastic polyurethane has a characteristic number from 980 to 1200.
• the characteristic number is defined by the molar ratio of isocyanate groups in component (a) used overall in the reaction to the groups reactive towards isocyanates, i.e. the active hydrogens, of components (b) and optionally chain extenders (c).
• the TPU production can be performed by known processes in a continuous manner, preferably using reaction extruders or the belt process according to one-shot or the prepolymer process, or in a discontinuous manner. According to the invention, preference is given to the one-shot process. In these processes, the components (a), (b) and optionally (c), (d) and/or (e) entering the reaction can be mixed in succession or at the same time as one another, in which case the reaction starts directly.
• the structural components (a), (b) and optionally (c), as well as the components (d) and/or (e) are introduced into the extruder individually or as a mixture, and reacted preferably at temperatures from 100° C. to 280° C., further preferably at 140° C. to 250° C.
• the resulting TPU is extruded, cooled and granulated.
• composition Z(W) can be added during or after the production, for example together with the components (d) and/or (e).
• thermoplastic polyurethanes based on polyetherols or polyesterols or mixtures of polyetherols and polyesterols.
• the present invention accordingly also relates to a process as described above where the thermoplastic polyurethane is a thermoplastic polyurethane based on a polyesterol or a polyetherol.
• the thermoplastic polyurethane is based on an MDI as diisocyanate and a polyesterol and/or polyetherol, in particular a polyester of adipic acid with butanediol and/or ethylene glycol and/or methylpropanediol and/or propanediol and/or hexanediol or a polyether based on polyethylene oxide, polypropylene oxide, and polytetrahydrofuran or the mixtures thereof.
• MDI diisocyanate
• a polyesterol and/or polyetherol in particular a polyester of adipic acid with butanediol and/or ethylene glycol and/or methylpropanediol and/or propanediol and/or hexanediol or a polyether based on polyethylene oxide, polypropylene oxide, and polytetrahydrofuran or the mixtures thereof.
• the present invention also relates to a thermoplastic polyurethane obtainable or obtained by a process as described above.
• the thermoplastic polyurethanes according to the invention are characterized by an increased hydrolysis stability.
• composition Z(W) comprising
• thermoplastic polyurethanes particularly during the production of injection molded products, extrusion products or compounds.
• the present invention also relates to moldings comprising a thermoplastic polyurethane obtainable or obtained according to a according to the invention or a thermoplastic polyurethane according to the invention. Furthermore, preference is given to injection molded products or extrusion products as moldings.
• thermoplastic polyurethanes As plasticizer for thermoplastic polyurethanes.
• thermoplastic polyurethanes As plasticizer for thermoplastic polyurethanes.
• the effect according to the invention is not limited to the scavenging of carboxylic acids produced by thermal degradation, i.e. the stabilizing effect does not arise upon the addition of stabilizers with a basic effect which scavenge only the resulting acid.
• Example 3.1 Example 3.2
• Example 3.3 Formulation Freeflex DPGA 15 [fraction in %] Citrofol ® ATBC BII 15 15 [fraction in %] Fraction of 0.435 0.435 0.435 Elastostab ® H01 in overall formulation [%] Type of Elastostab ® Addition of TPU Addition of TPU Premixed with H01 addition synthesis process synthesis process Citrofol ATBC BII Test Standard Unit Result Result Result Standard Density DIN EN g/cm 3 1.187 1.177 1.175 ISO 1183- 1A Shore A DIN 53505 71 72 73 TS longitudinal DIN EN MPas 40 38 40 BE longitudinal ISO 527 % 590 570 590 TPS DIN ISO kN/m 52 53 52 34-1, B (b Abrasion DIN 53516 mm 3 36 18 29 Exposure/artificial aging Hydrolysis resistance 80° C., H2O +56 d 35 d 56 d vapor TS longitudinal 32 MPas 24 MPas

Landscapes

• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Polyurethanes Or Polyureas (AREA)

Applications Claiming Priority (4)

Publications (2)

Family

ID=50028879

Family Applications (1)

Country Status (14)

Families Citing this family (2)

Citations (9)

Family Cites Families (6)

• 2015
  • 2015-01-21 CN CN201580006010.9A patent/CN105940033B/zh active Active
  • 2015-01-21 BR BR112016017346A patent/BR112016017346A8/pt not_active Application Discontinuation
  • 2015-01-21 MX MX2016009951A patent/MX2016009951A/es unknown
  • 2015-01-21 EP EP15702660.0A patent/EP3099725B1/de active Active
  • 2015-01-21 ES ES15702660T patent/ES2729411T3/es active Active
  • 2015-01-21 PL PL15702660T patent/PL3099725T3/pl unknown
  • 2015-01-21 HU HUE15702660A patent/HUE043480T2/hu unknown
  • 2015-01-21 WO PCT/EP2015/051067 patent/WO2015113874A1/de active Application Filing
  • 2015-01-21 RU RU2016135070A patent/RU2678842C2/ru not_active IP Right Cessation
  • 2015-01-21 JP JP2016549487A patent/JP2017504706A/ja active Pending
  • 2015-01-21 US US15/115,285 patent/US10927233B2/en active Active
  • 2015-01-21 PT PT15702660T patent/PT3099725T/pt unknown
  • 2015-01-21 KR KR1020167023770A patent/KR20160113709A/ko not_active Application Discontinuation
  • 2015-01-21 TR TR2019/06934T patent/TR201906934T4/tr unknown
• 2019
  • 2019-12-25 JP JP2019233859A patent/JP2020090668A/ja active Pending

Patent Citations (10)

Non-Patent Citations (2)

Also Published As

Similar Documents

Legal Events